AirHint found the following cheapest return flights from Boston (BOS) to Zurich (ZRH) in December 2025 (see full year).

Return flights

07 Dec - 10 Dec	Aer Lingus
08 Dec - 16 Dec	Aer Lingus
09 Dec - 13 Dec	Aer Lingus
09 Dec - 16 Dec	Aer Lingus
06 Dec - 13 Dec	Icelandair
04 Dec - 11 Dec	Aer Lingus
05 Dec - 10 Dec	TAP
05 Dec - 12 Dec	TAP
25 Dec - 10 Jan	Icelandair
12 Dec - 26 Dec	TAP
09 Dec - 23 Dec	SWISS	direct
26 Dec - 13 Jan	Icelandair
24 Dec - 13 Jan	Air Canada
26 Dec - 07 Jan	Scandinavian Airlines
24 Dec - 13 Jan	SWISS	direct
17 Dec - 18 Jan	Icelandair
17 Dec - 17 Jan	Icelandair
17 Dec - 15 Jan	Icelandair
17 Dec - 16 Jan	Azores Airlines
17 Dec - 19 Jan	Azores Airlines

Also check the deals for one-way flights from Boston to Zurich in December.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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Cheapest return flights from Boston to Zurich in December from 390€

Return flights